"That's an incredible achievement. It's built on the fact we can attract the best teachers and researchers who can, in turn, offer world-class teaching and carry out internationally respected research."
Mr Whelan said international education was New Zealand's sixth largest export market, generating $3.1 billion annually.
"Universities account for a third of that - mainly due to their strong reputation and rankings internationally."
However, he said New Zealand's university rankings had been "slowly slipping" over the past decade and it was getting harder and harder to compete for the international staff and students.
Times Higher Education World University Rankings editor Phil Baty said top institutions hired faculty members from all over the world.NZME